from random import random
def printIntro():
    print("这个程序模拟两个选手A和B的某种竞技比赛")
    print("程序运行需要A和B的能力值（以0到1之间的小数表示）")
def getInputs():
    a = eval(input("请输入选手A的能力值（0-1）:"))
    b = eval(input("请输入选手A的能力值（0-1）:"))
    n = eval(input("模拟比赛的场次:"))
    return a, b, n
def printSummary(winsA, winsB):
    n = winsA + winsB
    print("竞技分析开始，共模拟{}场比赛".format(n))
    print("选手A获胜{}场比赛，占比{:0.1%}".format(winsA, winsA / n))
    print("选手A获胜{}场比赛，占比{:0.1%}".format(winsB, winsB / n))
def gameOver(a, b):
    return a == 15 or b ==15
def simeOneGame(probA, probB):
    scoreA,scoreB = 0,0
    serving = "A"
    while not gameOver(scoreA, scoreB):
        if serving == "A":
            if random() < probA:
                scoreA += 1
            else:
                serving = "B"
        else:
            if random() < probB:
                scoreB += 1
            else:
                serving = "A"
    return scoreA,scoreB
def simeGame(n,probA,probB):
    winsA, winsB = 0, 0
    for i in range(n):
        scoredA, scoredB = simeOneGame(probA, probB)
        if scoredA > scoredB:
            winsA += 1
        else:
            winsB += 1
    return winsA, winsB
def main():
    printIntro()
    probA, probB, n = getInputs()
    winsA, winsB = simeGame(n, probA, probB)
    printSummary(winsA, winsB)
main()